bin/hadoop script doesn't allow for different memory settings for each daemon type
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Key: HADOOP-6167
URL: https://issues.apache.org/jira/browse/HADOOP-6167
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 0.20.0
Reporter: Fernando
bin/hadoop assumes that all daemon types ( namenode, datanode, jobtracker, tasktracker ),
all use the same memory settings.. (HADOOP_HEAPSIZE).
I propose changes to that script to allow overriding the default memory ( HADOOP_HEAPSIZE
), with daemon specific OPTS (HADOOP_NAMENODE_OPTS, etc ).
Basically at the bottom of the bin/hadoop script, it will check to see if the user has already
set "-Xmx" in the HADOOP_OPTS variable.. if so, then it will ignore the JAVA_HEAP_SIZE variable..
as such:
# run it
if [[ $HADOOP_OPTS == *-Xmx* ]]; then
exec "$JAVA" $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@"
else
exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@"
fi
I will attach the file as I have modified it..
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